Mechanical exercising device



fies, 29, 1931. HE. M COY MECHANICAL EXERCISING DEVICE Filed Aug. 6, 1 928 INVEN'EOR Patented Dec. 29, 1931 UNITED. STATES PATENT OFFICE HARRY E. MCCOY, E PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO MCDOWELL MANU- FACTURING COMPANY, OF MILLVALE, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA MECHANICAL EXERCISING DEVICE Application filed August 6, 1928. Serial No. 297,827.

This invention relates to mechanical exercising devices, and more particularly to that class of devices wherein straps which pass around the body are connected to a vibrating element and the vibrationof such element is transmitted to the body through the straps.

Thepresent invcntionhas for its purpose to provide a vibrating element of novel c011- struction, with an improved mechanism for effecting the vibration thereof through which vibrations of the desired amplitude are secured, the movement being one wherein the parts are of simple construction and the "vibration is efiected with a minimum amount of noise or chatter.

The invention also contemplates an arrangement by means of which an adjustment of the straps can be obtained to secure vibrations ofdili'erent magnitudes.

The invention may be readily understood by reference to the accompanying drawings, in which Figure 1 is av plan view of an exercising de vice embodying my invention;

F igure-Q is a side elevation thereof;

Figure 3 is a detail View of the bearing. with which the eccentric cooperates;

Figure a is a transverse vertical section in the plane of line IV-JVof Figure 3; and

Figure 5 is a detail view of the supporting bearing for the vibrating arm.

In the drawings, 2 designates a base hav ing a motor 3 thereon. At the front of the base is a vertical post 4 which is rigidly secured to the base and on which is mounted a sleeve 5. The sleeve 5 hasa transverse arm 6 thereon, the arm extending to each slde of the center post an: equal distance. Projecting rearwardly from" the arm 6 1s another arm 7 which ispreferably substantially 111' line with the shaft 8 of the motor 3. On the'end of the arm 7 is a cup-like member 9 having bearing strips 10 therein. Positioned between the bearing'strips lO'is a ball race 13 which is'free to slide up and down the bearing strips 10 and which is free to roclrthereon, the outside of the ball race being curved.

At the outer end of the motor shaft 8 is an eccentric terminal member 12 having a stud 12 thereon on which isa disk 11 positioned within the ball ring 13. Ballbearings 14 are located between the periphery of the disk and the inside of the ball ring 13.

When the motor is operated to rotate the shaft 8, the disk ll, which is eccentric to the shaft 8', is rotated. The rotation of the disk 11 causes the arm 7 to be rapidly oscillated back and forth, but due to the fact that the ball ring 10 is slidable in the housing or cup 9 no vertical movement is imparted thereto. Due to the fact that the arm 7 is relatively shorter than either portion of the arm 6, relatively small rocking movement of the arm 7 will give proportionately wider amplitude of movement to the outer ends of the arm 6. V

Secured to the arm 6 near the ends thereof are hooks 14 to whichstraps 15 may be con-- nected. The arm 6 may be provided with other hooks 16 intermediate its ends. By changing the straps 15 to different hooks, different degrees of vibration can be secured.

The base 2 is provided with pins 17 to which other straps 18 can be connected. These straps being for the purpose of anchoring the device in place.

A counter-balance 19 is carried on the cocentric t'erminal of the motor shaft to offset the eccentric 12 and thereby reduce vibration. I

The construction as herein described is extremely simple, and operates with a minimum amount of vibration and chatter. The oscil} lationof the arm' 6 is rapid, depending of course, on the speed of the motor 3. The mechanism has relatively fewer parts than devices heretofore employed for this purpose. The cup 9 retains lubricant and permits-the eccentric mechanism to be oiled without danger of oil being thrown by the machine during its operation. The post 4 provides a bearing for the sleeve 5 at both the top andbottom thereof, thereby preventing the arm'6 from binding on its bearing even when the pull of the straps 15 is not in the plane of the arm 6. I

While I have'illustrated one embodiment of my invention, it will be understood that the invention is not confined to the particu-- lar construction and arrangement of parts as herein specifically disclosed.

I claim:

1. A mechanical exercising device comprising a base, a cross arm pivotally supported on the base for movement in a horizontal plane, a rigid integral projection on the cross arm, a motor on the base, and an eccentric element on the motor operatively engaging bearing surfaces on the projection.

2. A mechanical exercising device comprising a base, a motor onthebase. a cross arm pivotally supported on the base for movement in a horizontal plane, a rearwardly extending arm on the cross arm having a pair of spaced-apart internal bearingsurfaces thereon, and an eccentric on the motor shaft engaging between the internal bearing surfaces of said arm. I

3. A mechanical exercising device comprising a base, a motor secured to the base, a cross arm pivotally supported on the base for movement in a horizontal plane only, a rearward- 1y extending arm centrally positioned on the cross arm and having a substantially inverted U-shaped housing at the rear end thereof, the sides of the u-shaped housing providing bearing surfaces, said motor having a shaft which projects into said end of the housing and having an eccentric thereon cooperating with the bearing surfaces of the housing.

4. A mechanical exercising device comprising a base, a motor secured to the base, said motor having a shaft, a cross arm pivotally supported on the base for movement in a horizontal plane only, a central extension on the cross arm projecting rearwardly toward the motor and having spaced-apart internal bearing surfaces thereon, an eccentric on the motor shaft, and a ball bearing ring on the eccentric fitting between the bearing surfaces of the arm. 7

5. A mechanical exercising device comprising a base, a motor secured to the base, said motor having a shaft, across arm pivotally supported on the base for movement in a horizontal plane only, a central extension on the cross arm projecting rearwardly toward the motor and having spaced-apart internal bearing surfaces thereon, an eccentric on the motor shaft, and a ball bearing ring on the eccentric fitting between the bearing surfaces of the arm, said ring being transversely rounded on its out-er surface to permit the extension to swing in an arc with reference to the ball ring.

6. A 'mechanical exercising device comprising a base, a motor on the base having a shaft, a cross arm pivotally supported on the base for movement in a horizontal plane only, a central extension on the arm projecting rearwardly and extending over thejend of the motor shaft, the inner end-of the arm having a chamber therein which is closed at the top and which is provided on each side with a bearing surface, an eccentric on the motor shaft within the chamber, a ball race on the eccentric having its periphery engagin the bearing surfaces inside the chamber.

A mechanical exercising device comprising a base, a motor on the base having a shaft, a cross arm pivotally supported on the base for movement in a horizontal plane only, a central extension on the arm projecting rearwardly and extending over the end of the motor shaft, the inner end of the arm having a chamber therein which is closed at the top and which is provided on each side with a bearing surface, an eccentric on the motor shaft within the chamber, a ball race on the eccentric having its periphery engaging the bearing surfaces inside the chamber, at least one of the bearing surfaces being replaceable.

8. A mechanical exercising device comprising a base, a motor on the base having a shaft, a cross arm pivotally supported on the base for movement in a horizontal plane only, a central extension on the arm projecting rearwardly and extending over the end of the motor shaft, the inner end of the arm having a chamber therein which is closed at the top and which is provided on each side with a bearing surface, an eccentric on the motor shaft within the chamber, a ball race on the. eccentric having its periphery engaging the bearing surfaces inside the chamber, said eccentric having a counterbore thereon.

9. A mechanical exercising device comprising a base, a motor mounted on the base having a shaft the center line of which extends along the center line of the base, an upright post on the base, a cross arm resting on the post, a pin on the post passing through the cross arm providing a pivot therefor, belt attaching means on the cross arm at opposite sides of'the pin, and a driving connection between the motor and the cross arm through which the cross arm is vibrated in a horizontal plane only, said driving connection comprising a rigid integral projection extending from the cross arm and an eccentric element on the motor operatively engaging bearing surfaces on the projection.

10. An exercising machine, comprising a base, a drive shaft, means for driving said shaft, and an exerciser lever having on one end an upstanding lug and an arm extending from each of two opposite sides thereof transversely of the base, said lug being pivotally secured to the base, an arm extending rearwardly and longitudinally of the base, and a vertical cylinder on the rearmost. end of said arm receiving power from the drive shaft to oscillate said transverse arm.

11. In a health exerciser, a rocker arm adapted to hold and give horizontal oscillatory motion to an applicator, said arm being pivotally supported at its center, a vertical sleeve rigid with said arm and offset from the. plane of said arm at the center thereof, a bearing block positioned in said sleeve having lengthwise movement therein, a crank adjacent to and behind said sleeve, an eccentric crank pin on said crank having engagement in a transverse hole provided in said bearing block, whereby rotary motion of said crank is translated into horizontal oscillatory motion of said sleeve, and means for driving said crank.

In testimony whereof I have hereunto set my hand.

HARRY E. MCCOY. 

